how to concat string in react native?

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1import React, { useState, useEffect } from 'react';
2import { Text, View, StyleSheet } from 'react-native';
3
4export default function App() {
5  const [firstString, setFirstString] = useState('Hi');
6  const [secondString, setSecondString] = useState('Infintbility');
7
8  useEffect(() => {
9    let result = firstString + ' ' + secondString;
10    console.log(result);
11  }, []);
12
13  return (
14    <View style={styles.container}>
15        <Text>{firstString + ' ' + secondString}</Text>
16    </View>
17  );
18}
19
20const styles = StyleSheet.create({
21  container: {
22    flex: 1,
23    justifyContent: 'center',
24    backgroundColor: '#ecf0f1',
25    padding: 8,
26  },
27  paragraph: {
28    margin: 24,
29    fontSize: 18,
30    fontWeight: 'bold',
31    textAlign: 'center',
32  },
33});